Chaetosogonocephus minor, Pace, 2014

Pace, R., 2014, Aleocharinae from Sabah (Borneo) collected by Guillaume de Rougemont (Coleoptera, Staphylinidae), Linzer biologische Beiträge 46 (1), pp. 727-794 : 743

Chaetosogonocephus minor nov.sp. ( Figs 19 and 106-107 )

T y p e m a t e r i a l Holotype, Sabah, Danum Valley, B.R.L., f.i.t, 14-16.II.2007, G. de Rougemont leg. (CROU). Paratype: 1, same provenance as the holotype (CROU).

D e s c r i p t i o n: Length 1.84-1.96 mm. Body shiny, brown, sides of the pronotum, humeral angles of elytra, posterior margins of the free abdominal tergites and pygidium reddish, antennae and legs yellowish-red. Second antennomere shorter than the first, third as long as the second, fourth to tenth strongly transverse, eleventh as long as the seven preceding antennomeres taken together. Eyes very large in dorsal view. Body devoid of reticulation. Puncturation of the head little evident, very superficial and absent on the longitudinal median band. Granulation of pronotum and elytra fine and very superficial, absent on the longitudinal median band and near the posterior margin of the pronotum. Free abdominal tergites impunctate and devoid of granulation. Male fifth free tergite with posterior median striae, male sixth free tergite densely punctate. Aedeagus: Figs 106-107.

C o m p a r a t i v e n o t e s: In the length of the eleventh antennomere, the new species is similar to C. notaticornis PACE, 2008 also from Borneo, but the aedeagus is 0.2 mm long, while that of C. notaticornis measures 0.25 mm. The ventral profile of the aedeagus of the new species is slightly curved, while is clearly curved in C. notaticornis . The internal sclerotised piece of the aedeagus of the new species is short, whereas it is very long in C. notaticornis .

E t y m o l o g y: The new species is called "smaller" for its small body size in comparison with the species described above.

Figures

Figs 13-24: Habitus. (13): Pelioptera plenitudinis nov.sp., scale bar 2.1 mm; (14): Pelioptera irregularis nov.sp., scale bar 3 mm; (15): Dikraspedella borneensis nov.sp., scale bar 2.5 mm; (16): Doryloxenus borneensis nov.sp., scale bar 1.5 mm; (17): Mesomegaskela rougemonti nov.sp., scale bar 5.3 mm; (18): Chaetosogonocephus nobilis nov.sp., scale bar 3 mm; (19): Chaetosogonocephus minor nov.sp., scale bar 1.9 mm; (20): Chaetosogonocephus ruficollis nov.sp., scale bar 3.6 mm; (21): Chaetosogonocephus danumensis nov.sp., scale bar 2.3 mm; (22): Chaetosogonocephus luteicollis nov.sp., scale bar 1.9 mm; (23): Malayloeblius borneensis nov.sp., scale bar 2.5 mm; (24): Rougemontius borneensis nov.sp., scale bar 3 mm.

Figs 101-116: Aedeagus in lateral and ventral view and spermatheca. (101-103): Mesomegaskela rougemonti nov.sp.; (104-105): Chaetosogonocephus nobilis nov.sp.; (106-107): Chaetosogonocephus minor nov.sp.; (108): Chaetosogonocephus ruficollis nov.sp.; (109-111): Chaetosogonocephus danumensis nov.sp.; (112-113): Chaetosogonocephus luteicollis nov.sp.; (114-116): Malayloeblius borneensis nov.sp. Scale bars: 0.1 mm.